Filtration units



1.1 : Perspective

1.2 : Bottom

1.3 : Top

1.4 : Front

1.5 : Back

1.6 : Left

1.7 : Right

2.1 : Perspective

2.2 : Bottom

2.3 : Top

2.4 : Front

2.5 : Back

2.6 : Left

2.7 : Right

The broken lines illustrating portions of the filtration units form no part of the claimed design. 

CLAIM The ornamental design for filtration units, as shown and described. 